In 2001 he published the book A User's Guide to the Brain, in which he describes the human brain as a flexible muscle, which works on a "use it or lose it" basis.
Ratey and Hallowell reunited for the book ADHD 2.0. released and published in 2021. The book serves as an updated review of current research on ADHD or VAST (Variable attention stimulus trait) as described in the book. Current non-medical and medical treatment protocols are reviewed in this book. This includes new empirical research over the last 30 years.
^The message of the book: "Get familiar with your brain and deal with it. Use the good qualities and acknowledge your deficits. This is not playing the excuse card at all - it's a call to responsibility. And to awareness."A Conversation With John Ratey. Psychology Today. May 1, 1997